Quick drop attachment for type casting machines



Jan. 3, 1933. w, ROBlSON 1,893,247

QUICK DROP ATTACHMENT FOR TYPE CASTING MACHINES Filed March 24, 1951 2 Sheets-Sheet l ENTER 1 T. w. ROEASON 52 7 5(0 flTTUR/VE Jan. 3, 1933. w, RQBlSON 1,893,247

QUICK DROP ATTACHMENT FOR TYPE CASTING MACHINES Filed Mafch 24, 1931 2 sheets sheet 2 //\//E/\/ TUR T. W. EOEMSON /-7 7- TURNE/ Patented Jan. 3, 1933 mas -fla L nomsw B03IS0N; r HIL sDA 03-3 91? ourcxjnaor ArrAoHME-nrronrYPn ensuring ac nes Application fi led March 24, 1931. Serial N 524,339;

The second object is the provision of an at tachmentwhichcan be installed on existing machines without-interfering withtheir op-v eration in any way and without altering or drilling numerous holes therein and with the addition of only a minimum number of new parts. i I These, and other objects, will become more apparent from the'specification followingas illustrated in the accompanying drawings,

in which:

Fig. 1 is a perspective view showing the related parts of an intertype machine and the new attachment thereto.

Fig. 2 is a vertical section along the line 22 in Fig. 1. V

Fig. 3 is a horizontal section along the lines 33 in Fig. 2.

Fig. 4 is .a fragmentary view showing the latched position of the quick drop block.

- Fig. 5 is similar to Fig. 4 showing the un- 39 latched position of the quick drop block.

Fig. 6 is a similar View showing the pot pump cam roll riding upon the block.

Fig. 7 is a similar View showing the quick drop block pushed back to a latched position.

Similar numbers of reference refer to similar parts throughout the several views.

Before entering into a description of this device it will be understood that what is known as the quick drop attachment on type casting machines is applied to the pot pump cam in front of the dip which permits the pump lever to make its casting stroke. It is used when casting fine hair line borders and if difficulties are encountered in securing a good face on the slugs, as Well as in casting type having a large face and a relatively small body. The function of the device is to permit the plunger to descend more rapidly than is required for ordinary work for the .59 purpose of injecting the metal into the mold' with greater force, sufficient, in fact, to :pro

ject same instantaneously over the entire ii'ace of the matrices; I In order to illustrate this invention there is shown a number of related elementsiof an intertype casting machine, among which is a mold gear arm lOwhich is adjacent to the" casting pot 11, through the top'of which 'extends a. plunger 12 by whose :A downward descent metal is forced fromvthe pot 111 through the channel 13"intoth e matrices (not shown).- Tothe plunger 12 is attached a pot pump lever 14. which is urged down wardly by the pot pump spring 15 acting through the rod 1 l bracket 17.

l Passing through the bracket 17 is pot pump lever shaft 18; identical withthe one now in use, except that it is madetubular and forms a bearing for arock shaft 1 9, on on'e end of which is mounted'a latchoperating lever 20, and on the other end of which is mounted a rock lever 21 which is joined by meansof a pin 22to a bent rod "28 which guides at'its opposite end 24 in the frame casting 25 and has on its extreme end a but-- ton-26 by means of which it may be moved in or out.'The*pi n 22 is connected to the pin 27 by means of a spring '28 adaptedto--u r "ge the lever 21 toward one of its extreme posi- 89 tions. i

'On the lower end 29 of the pump lever 14 is mounted a pot pump cam roll 3.0 which rides on the'surface of the pot pump cam -31. I At the of the pump cam ;31 ishingedly mounteda quick drop block 32 which forms apart of the high portion 33 of the cam 31. A spring 34;. is interposed between the block 32. and the ,cam 3l normally urging same apart against the stop 35, providing a yielding. dip for the cam 31.. However, when the quick .drop action is not desired the block 82 iatched to a retracted position as shown in Figures 1 and 4) by means of a block latch 36' which engages the square lug .37 on the side of the block 32. The block latch :36 provided with a spring arm 38 Whose end is rged toward the pin 39, upon which the lo k 2 is hinged by m ns-o the (a ring 4:0-

On the block latch 36 is also f hrmed a 190 which passes'through the 65?- 7 i roller arm 41 whose roller 42 lies in the path of a latch tripping arm 43 which is hinged on the end 29 of the pot pump lever 14 by means of a screw 44. The arm 43 is connected to the lever 20 by'means of a link 45. The operation of the device is as follows:

If it is-desired to use the quick drop attachment the operator who is conveniently near the button 26 merely pulls it out causing it roll 30, and at the same time-re-latches the block 32 in the position shown in Fig. 7..

It is desirable to provide a spring 47 between ,the arm 43 and thelever end 29 for thepurpose of preventing injury to the parts should the cam-31 be reversed, in which case the roller 42 might strike solidly against the projecting end of the arm 43. r

; Itis desirable to .providea clearance between the edge 48 of the latch 36 and the lug 37 in order that the latch 36 may firmly engage the lug 37.

If it is desired to dispense with the quick drop action the operator merely pushes the button 26 inwardly, which causes the arm 43 to be lifted out of the, path of the roller 42 permitting the latch 36 to holdthe block 32 in the position shown in Fig.v 4throughout the revolution of the cam.

It will be observed that in the construction of this attachmentca-re has been taken not to interfere with the operation of the machine in any way, nor to require the alteration of its parts other than those mentioned, but making it possible for the operator to easily and quickly avail himself of the advantages ofthe quick drop action without rising from his-seat.

I claim:

1. A quick drop attachmentfortype casting machines having in combination a quick drop block hingedly mounted in front of the dip .of the pump cam and having spring means for urging the outer portion thereof away from the high portion of said pump cam, a latch for holding said block in a retracted position, a latch tripping arm adapted to be swung across the path of said latch for thepurpose of unlatching same by the rotation of said cam, and means for moving said arm into and out of a latch engaging position. 7

6 2. A quick drop mechanism for type casting machines comprising the combination of a pump cam having a yieldable dip with means for latching said dip into a retractedposition, and means for releasing said latch by the rotation of said cam.

lever at the other end of said rock shaft, a.

rod connected to said rock lever for the purposeof operating same, a latch tripping arm hinged in the-path of said quick dropmechanism having means for operating same from the latch operatinglever, and a latch adapted to normally hold said quick drop mechanism inoperative having a roller arm thereon adapted to engage-said-latch tripping arm when moved into the path thereof by, said rod.

5; A quick drop mechanism for typecasting machines having in combination a pot pumpcam provided with a dip over which the cam roller drops during the casting operation, ayieldable block hinged in front of said dip forming an extension for the.

raised portion of the cam, a latch on saidcam normally holdingsaid block in a retracted position, and a tripfor saidlatch operable from the operators side of the casting machine.

- .THOMAS w. .ROCBISON. 

